240 Mr Shah and Mr Wilson, On an empirical formula connected 



The accompanying table gives the number of decompositions — 

 actual and theoretical — for thirty-five numbers ; the value found 

 for the constant A was 0"66016. In the second column the first 

 number is the number of decompositions, using prime numbers only, 

 and the second the number of decompositions involving powers of 

 primes higher than the first. 



